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CVE-2025-69247

free5GC has Heap Buffer Overflow in UPF Leading to Denial of Service

Published: Feb 23, 2026Updated: Feb 25, 2026 Sources: CVE List NVDCWE-122
7.5HIGH
NVD MITRE
EPSS Score
0.5%
Top 58.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

free5GC go-upf is the User Plane Function (UPF) implementation for 5G networks that is part of the free5GC project. Versions prior to 1.2.8 have a Heap-based Buffer Overflow (CWE-122) vulnerability leading to Denial of Service. Remote attackers can crash the UPF network element by sending a specially crafted PFCP Session Modification Request with an invalid SDF Filter length field. This causes a heap buffer overflow, resulting in complete service disruption for all connected UEs and potential cascading failures affecting the SMF. All deployments of free5GC using the UPF component may be affected. Version 1.2.8 of go-upf contains a fix.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-122

Affected Products

free5gc
oss-projectaka free5gc udm, free5gc smf, smf, udm
go-upfOn-premNetwork Device
Networking Infrastructure / router-switch

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://github.com/free5gc/free5gc/issues/746
github.com
https://github.com/free5gc/free5gc/security/advisories/GHSA-gf69-93xr-p23g
github.com
https://github.com/free5gc/go-upf/commit/b798fe5ee6a984be492fa53958dd5f1305469f85
github.com
and 1 more references View all →

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